Multi Language Support

## 🚀 Feature Request

Currently, **AI Watchman** (`ai-watchman`) provides native threat detection, jailbreak guards, and security monitoring integrations primarily for Python backends (FastAPI, Django, Flask).

To expand the tool's adoption and protect modern web stacks, we should build a JavaScript / Node.js SDK and dedicated middleware for popular Node.js frameworks.

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## 🎯 Proposed Solution

Create a Node.js companion client / middleware suite (`@ai-watchman/express`, `ai-watchman-node`, or REST API wrapper) that allows Node.js applications to inspect incoming HTTP requests, detect threats/jailbreaks in real time, and report security events to the AI Watchman engine.

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## 📦 Targeted Node.js Frameworks

1. **Express.js** (`watchmanExpressMiddleware`)
2. **Fastify** (`watchmanFastifyPlugin`)
3. **Next.js** (API route handler & Server Action wrapper)
4. **NestJS** (`@UseGuards(WatchmanGuard)`)
5. **Koa** (`watchmanKoaMiddleware`)

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## 🛠️ Key Components & Implementation Ideas

### 1. Middleware Interface
Expose an intuitive API similar to our Python integrations:

```javascript
// Express example
import { watchman } from '@ai-watchman/express';

const app = express();

app.use(watchman({
apiKey: process.env.WATCHMAN_API_KEY,
enableJailbreakGuard: true,
actionOnThreat: 'block', // 'block' | 'log' | 'sanitize'
}));

No source files, tests, or concrete entry points are named. Start by reviewing the existing Python integrations and narrowing the proposal to a defined Node.js package and framework scope; done should include the selected middleware or client working for that scope and its threat-reporting behavior.

Written by the indexing model from the issue text.